Excretion I believe let me know if i was wrong.
:)
Answer:
(16810) is the value of X that would make NO ll KJ.
competition
source: my biology teacher
<span>Ethology is a branch of zoology concerned with the study of animal behavior. Ethologists take a comparative approach, studying behaviors ranging from kinship, cooperation, and parental investment, to conflict, sexual selection, and aggression across a variety of species.</span>
